Species
Pycnosteus tuberculatus (Rohon, 1901)
Synonymy list
1901     Ganosteus tuberculatus — Rohon , pp. 12-13, fig. 1:2; 2:23
1935     Pycnosteus palaeformis  — Gross , fig. II 1
1940     Pycnosteus tuberculatus (Rohon, 1901) — Obruchev , pp. 768
1947     Pycnosteus tuberculatus (Rohon) — Obruchev , pp. 196, fig. 1:6
1956     Pycnosteus cf. tuberculatus  — Mark , pp. 81, fig. 5
1956     Pycnosteus tuberculatus (Rohon) — Mark , pp. 77-81, fig. I 2-6; II 2,3; III 1-3
1961     Pycnosteus tuberculatus  — Mark , pp. 34, fig. 3b
1965     Pycnosteus tuberculatus (Rohon, 1901) — Obruchev & Mark-Kurik , pp. 140, fig. XXVI 3; XXVIII 1-3; XXIX 1,2; XXX 1-4; 
1965     Pycnosteus tuberculatus (Rohon, 1901) — Halstead Tarlo , pp. 73, fig. text fig. 18
2000     Pycnosteus tuberculatus  Rohon — Mark-Kurik , pp. 316
Selection of related publications
Märss, T., Kleesment, A., Niit, M. 2008. Karksilepis parva gen. et sp. nov. (Chondrichthyes) from the Burtnieki Regional Stage, Middle Devonian of Estonia.  Estonian Journal of Earth Sciences   57,   4,   219-230. DOI:10.3176/earth.2008.4.02
Mark-Kurik, E. 1968. New finds of psammosteids (Heterostraci) in the Devonian of Estonia and Latvia.  Eesti NSV Teaduste Akadeemia Toimetised. Keemia, Geoloogia / Известия Академии наук Эстонской ССР. Химия. Геология   17,   4,   409-424. DOI:10.3176/chem.geol.1968.4.11
Obruchev, D. V., Mark-Kurik, E. J. (eds) 1965. Devonian psammosteids (Agnatha, Psammosteidae) of the USSR. pp. 1-304.  Eesti NSV TA Geoloogia Instituut. 
Halstead Tarlo, L. B. H. 1965. Psammosteiformes (Agnatha) - A review with descriptions of new material from  the Lower Devonian of Poland. 2. Systematic part.  Palaeontologia Polonica   15,      1-168.
Mark, E. J. 1956. On Genus Pycnosteus (Psammosteidae, Agnatha).  ENSV TA Geoloogia Instituudi Uurimused   I,      74-88.
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Chordata | 
| Subphylum | Vertebrata | 
| Superclass | Agnatha | 
| Class | Pteraspidomorphi | 
| Subclass | Heterostraci | 
| Order | Pteraspidiformes | 
| Suborder | Psammosteida | 
| Family | Pycnosteidae | 
| Genus | Pycnosteus | 
| Species | palaeformis | 
| pauli | |
| tuberculatus | 
References based on distribution
- Märss et al., 2008 Karksi outcrop Burtnieki Stage